Oil Pump (Bx1860, Bx2360) - Kubota BX1860 Workshop Manual

BX1860, BX2360, BX2660, RCK48(P)-18BX, RCK54(P)-23BX, RCK60B-23BX, LA203, LA243, WSM

(6) Oil Pump (BX1860, BX2360)

Correcting Cylinder (BX2660)
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
Factory spec.
Oversized cylinder liner
I.D.
Allowable limit
2. Replace the piston and piston rings with oversize ones.
Oversize : 0.5 mm (0.02 in.)
NOTE
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
(1) Cylinder I.D. (Before Correction)
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
Rotor lobe clearance Factory spec.
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the oil
pump rotor assembly.
Clearance between
outer rotor and pump Factory spec.
body
Clearance between Rotor and Cover
1. Put a strip of plastigage onto the rotor face with grease.
2. Install the cover and tighten the screws.
3. Remove the cover carefully, and measure the amount of the
flattening with the scale and get the clearance.
4. If the clearance exceeds the factory specifications, replace oil
pump rotor assembly.
Clearance between rotor
Factory spec.
and cover
1-S66
ENGINE
76.500 to 76.519 mm
3.0119 to 3.0125 in.
76.65 mm
3.018 in.
(2) Cylinder I.D. (Oversize)
W10344480
0.030 to 0.14 mm
0.0012 to 0.0055 in.
W10378950
0.070 to 0.15 mm
0.0028 to 0.0059 in.
W10381420
0.0750 to 0.135 mm
0.00296 to 0.00531 in.
W10382660
KiSC issued 06, 2009 A